package com;

import java.io.Serializable;
import java.util.List;

/**
 * @authoer zsj
 * @date 2022/6/16 19:17
 */
public interface Test extends Serializable, List<Object>{

    default double sqrt(int a) {
        return Math.sqrt(a);
    }

    public static void main(String[] args) {
        for (int i = 1; i < 99; i++) {
            if (i * 27 - i * 21 == 72) {
                System.out.println(i);
                System.out.println(i * 21);
            }
        }
    }
}
